XF 1.5 How to remove zero from prices

I have Persian Paygate for any payment in my forum and in our currency we don't have any .00 in price.
For Example: 1000 Toman (But now my forum shows "1000.00 Toman" and so users think that the price is 100000 Toman! Although it works correct and just decrease 1000 from their account)